Destabilisation of the Li–N–H hydrogen storage system with elemental Si

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Destabilisation of the Li–N–H hydrogen storage system with elemental Si. / Nayebossadri, Shahrouz; Aguey-Zinsou, Kondo François.

In: Physical Chemistry Chemical Physics, Vol. 13, No. 39, 21.10.2011, p. 17683-17688 .

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@article{3cfa490b6b8a477aba566c59acb1c2f1,
title = "Destabilisation of the Li–N–H hydrogen storage system with elemental Si",
abstract = "A significant improvement in the dehydrogenation kinetics of the (LiNH2 + LiH) system was obtained upon doping with elemental Si. Whilst, complete dehydrogenation of the (LiNH2 + LiH) system requires more than 2 h, the time required for full dehydrogenation was reduced to less than 30 min by doping with elemental Si. It is observed that Si thermodynamically destabilises the system through the formation of novel intermediate phases resulting from the reaction of Si with both LiNH2 and LiH. Such intermediate phases are also believed to enhance reaction kinetics by providing a path for accelerated dehydrogenation and the rapid release of hydrogen at the early stages of the reaction. It is believed that the dehydrogenation kinetics of the (LiNH2 + LiH) system, which is controlled by the diffusion of H− from LiH and H+ from LiNH2, becomes independent of diffusion upon Si addition due to an enhanced concentration gradient in reactive ionic species.",
author = "Shahrouz Nayebossadri and Aguey-Zinsou, {Kondo Fran{\c c}ois}",
year = "2011",
month = oct,
day = "21",
doi = "10.1039/C1CP22408E",
language = "English",
volume = "13",
pages = "17683--17688 ",
journal = "Physical Chemistry Chemical Physics",
issn = "1463-9076",
publisher = "Royal Society of Chemistry",
number = "39",

}

RIS

TY - JOUR

T1 - Destabilisation of the Li–N–H hydrogen storage system with elemental Si

AU - Nayebossadri, Shahrouz

AU - Aguey-Zinsou, Kondo François

PY - 2011/10/21

Y1 - 2011/10/21

N2 - A significant improvement in the dehydrogenation kinetics of the (LiNH2 + LiH) system was obtained upon doping with elemental Si. Whilst, complete dehydrogenation of the (LiNH2 + LiH) system requires more than 2 h, the time required for full dehydrogenation was reduced to less than 30 min by doping with elemental Si. It is observed that Si thermodynamically destabilises the system through the formation of novel intermediate phases resulting from the reaction of Si with both LiNH2 and LiH. Such intermediate phases are also believed to enhance reaction kinetics by providing a path for accelerated dehydrogenation and the rapid release of hydrogen at the early stages of the reaction. It is believed that the dehydrogenation kinetics of the (LiNH2 + LiH) system, which is controlled by the diffusion of H− from LiH and H+ from LiNH2, becomes independent of diffusion upon Si addition due to an enhanced concentration gradient in reactive ionic species.

AB - A significant improvement in the dehydrogenation kinetics of the (LiNH2 + LiH) system was obtained upon doping with elemental Si. Whilst, complete dehydrogenation of the (LiNH2 + LiH) system requires more than 2 h, the time required for full dehydrogenation was reduced to less than 30 min by doping with elemental Si. It is observed that Si thermodynamically destabilises the system through the formation of novel intermediate phases resulting from the reaction of Si with both LiNH2 and LiH. Such intermediate phases are also believed to enhance reaction kinetics by providing a path for accelerated dehydrogenation and the rapid release of hydrogen at the early stages of the reaction. It is believed that the dehydrogenation kinetics of the (LiNH2 + LiH) system, which is controlled by the diffusion of H− from LiH and H+ from LiNH2, becomes independent of diffusion upon Si addition due to an enhanced concentration gradient in reactive ionic species.

U2 - 10.1039/C1CP22408E

DO - 10.1039/C1CP22408E

M3 - Article

VL - 13

SP - 17683

EP - 17688

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

IS - 39

ER -